Flush-tank.



D. S. MclLROY & W. GIBB.

FLUSH TANK.

APPLICATION FILED APR.20. 1914.

Patented May 18, 1915.

WWI/23.5565

flag

THE NORRIS PETERS CO. PHOI'KLLITHOH WASHINGTL'L'. D. C.

DAVID SUTTIE MOILROY AND WILLIAM GIBB, OF CALGARY, ALBERTA, CANADA.

Specification of Letters Patent. Patented May 18, 1915 Application filed Apri120, 1914. Serial No. 833,281.

To all whom it may concern:

Be it known that we, DAVID SUTTIE Mo- ILROY and WILLIAM GIBB, subjects of the King of Great Britain, and both residents of the city of Calgary, in the Province of Alberta, Dominion of Canada, have invented certain new and useful Improvements in Flush-Tanks; and we do hereby declare that the following is a full, clear, and exact description of the same.

The invention relates to improvements in flush tanks for water closets, urinals, drains, etc., whereby an air chamber in the form of a small tank is fixed rigidly inside of a flush tank, having a siphon connection for flushing and an air outlet pipe with a push button valve arrangement for releasing the pressure of the air in air chamber, and an automatic piston check or other valve at the top of the air chamber, operated by a ball float or other automatic means, which seals air chamber until tank is again filled with water, thus avoiding the withdrawal of all the air from the air chamber by the push button valve being held open longer than necessary.

All the parts under water being perfectly rigid, there is practically no liability of any part getting out of working order, nor the attendant wear and tear of movable parts as in the present systems, the whole device being very simple of construction and easy of manufacture.

We attain these objects by means of the mechanism illustrated in the accompanying drawings, in which Figure l is a sectional view of a flush tank, showing the arrangement of the air chamber, siphon connection and air outlet pipe. Fig. 2 is a top view of flush tank showing the location and arrangement of the difl'erent parts.

Similar letters refer to similar parts throughout the various views.

A is an ordinary flush tank having rigidly attached to the bottom thereof an air chamber B, with small openings at at the bottom to admit the water. Leading into the air chamber B is a siphon arrangement G, which is also attached to the outlet pipe D at the bottom of the flush tank. Attached to the topof air chamber B is an air outlet pipe E, which comes-out through the top of flush tank A, and leads down either end or side of tank as shown by E and b, or if necessary can be carried down the wall or. any other suitable location. At the far end of the air outlet pipe E is a push button valve F, which releases the air from air outlet pipe E and air chamber B, causing the discharge of siphon C. When the water in air chamber B is discharged, a sufficiency is retained in container Gr and trap H of the siphon, to seal the air chamber B and secure compression in both air chamber B and air outlet "pipe E for the next flush.

Attached to air outlet pipe E at the top of air chamber B is an automatic piston check valve J, operated by a ball float K, or by the water supply ball float by means of a suitable connection, which automatically seals air chamber B, when water is withdrawn from tank A, and prevents the breaking of siphonic action by the push button valve F being held open for too long a time. As the tank A fills with water, the ball float K automatically opens the piston check valve J, in the outlet pipe E, the whole arrangement being then controlled by push button valve F.

The ball float K is fitted loosely to rod 0, and held in place by bolts onthe rod, placed on either side of the ball, so that the ball can be moved back and forth, which regulates the time for the opening and closing of check valve J.

The water inlet in the tank is similar to that in the ordinary flush tank with the ball float arrangement.

What we claim is:

In flush tanks, a tank having a water inlet and outlet, an air chamber within said tank having water inlets adjacent to the lower end and an air outlet at the upper end an outlet water pipe in S-shape having its inner her and the other end projecting down- Signed at Calgary, Province of Alberta, wardly to the tank outlet, an air pipe ex- Canada, this thirty-first day of March, 1914. 10

tending upwardly from said air outlet and downwardly to a suitable support, an air MGILROY' valve at the lower end of said air pipe, a p p float operated valve 'gear, and a11" airvalve Witnesses:

above said air outlet operativel'y 'cofineeted MARYW. MQIILROY,

with said float valve gear. S. FRASER.

Copies of this patent may be obtained for five eents each, hy addressing the Commissioner of Batents,

washixigtbn; 20. G3 

